Overhead line grounding end shielding device

Abstract

The utility model relates to the field of power line protection, in particular to an overhead line ground-entering end shielding device which comprises a shielding pipe set, the shielding pipe set comprises a shielding pipe sleeve, a positioning groove, an overhead line pipe cavity, an inverted cavity, a corrugated groove, a tin foil layer, a metal net, a triangular large hole and a triangular small hole, the overhead line pipe cavity is formed in the middle of the shielding pipe sleeve, and the inverted cavity is formed in the middle of the shielding pipe sleeve. Two tinfoil layers which are connected in an annular mode are arranged in the pipe cavity of the overhead line, so that a double-layer metal shielding layer is formed. When in use, the power cable can be quickly disassembled from the overhead line pipe cavity through the double tinfoil layers in ring connection and the metal net in ring connection, the fastening bolt is twisted to open the sealing strip, and the sealing strip is disassembled by using the inverted cavity, so that the destructive disassembly and maintenance work of the power shielding layer is completely eradicated.

Description

Technical Field

[0001] The utility model relates to the field of power line protection, in particular to a shielding device for an overhead line ground terminal. Background Art

[0002] Undergrounding and electromagnetic shielding of overhead lines usually involves multiple steps and technologies. This device plays an important role in power transmission lines, especially high-voltage transmission lines, and can reduce interference and risks to surrounding electronic equipment and residents.

[0003] At present, due to the large demand for undergrounding of overhead lines, and the limited adaptability of underground shielding technology and devices for overhead lines, there are poor direct burial problems in terms of specific installation structure and convenience of maintenance. Therefore, those skilled in the art provide an overhead line underground shielding device to solve the problems raised in the above background technology. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an overhead line underground end shielding device, including a shielding tube group, the shielding tube group includes a shielding tube sleeve, a positioning groove, an overhead line tube cavity, an inverted cavity, a corrugated groove, a tin foil layer, a metal mesh, a triangular large hole and a triangular small hole. An overhead line tube cavity is opened in the middle of the shielding tube sleeve, and two layers of ring-connected tin foil layers are arranged inside the overhead line tube cavity, so as to form a double-layer metal shielding layer, which reduces the incident energy of radiation interference, reduces the interference effect on the circuit, and can also enhance the anti-interference ability of the circuit. Compared with copper foil paper, tin foil paper has higher strength, smoother surface and is not easy to oxidize, so it performs better in corrosion resistance. A ring-connected metal mesh is arranged in the gap cavity between the tin foil layers, and the metal mesh is woven by multiple fine metal wires, which effectively avoids the influence of other electronic equipment and electromagnetic interference in the surrounding environment on the stability of data transmission, thereby improving the rate and quality of data transmission.

[0005] Preferably: the two end ports of the shielding tube group are provided with sealing seats, a number of positioning columns are fixedly installed on the sealing seats, a number of positioning grooves are opened on the ports of the shielding tube sleeve, the positioning grooves and the positioning columns are correspondingly plugged in, and the positioning columns connect and seal the sealing seat with the shielding tube group.

[0006] Preferably: a sealing strip is provided at the middle of the lower end surface of the shielding tube group, the sealing strip is in a T-shape, and a plurality of fastening bolts are provided on the sealing strip.

[0007] Preferably, a reverse cavity is provided at the lower end of the overhead line tube cavity, and the reverse cavity is arranged as an angle cavity, so that the overhead line can be freely disassembled independently for easy maintenance.

[0008] Preferably: the shielding pipe sleeve has a lower end surface with corrugated grooves symmetrically formed on the left and right sides, and the corrugations at the bottom of the corrugated grooves are used to make high-area contact with the ground for direct burial, ensuring that the shielding pipe sleeve will not turn outward during the direct burial process, thereby increasing stability.

[0009] Preferably: a plurality of triangular small holes are arranged equidistantly in the middle of the end face of the metal mesh, and a plurality of triangular large holes are opened on the left and right end faces of the metal mesh. The metal mesh is ring-connected so that one side of the triangular small holes corresponds to the surrounding electronic equipment and residents, thereby increasing the bending and ductility of the metal mesh to ensure that the triangular small holes can be consistent with the triangular large holes after ring connection, protecting the cable core inside from damage by external forces, and playing a grounding protection role, so that the internal circuit is not affected by external electromagnetic interference, ensuring that the internal electromagnetic energy is not easily leaked.

[0010] Technical effects and advantages of the utility model:

[0011] 1. When the utility model is used, the power cable can be quickly removed from the overhead line tube cavity through the ring-connected double-layer tin foil layer and the ring-connected metal mesh, the fastening bolt is twisted to open the sealing strip, and the inverted cavity is used for removal, thereby eliminating the destructive disassembly and maintenance work on the power shielding layer.

[0012] 2. When the utility model is used, the corrugations at the bottom of the corrugated groove are used to make high-area contact with the ground for direct burial, so as to ensure that the direct burial will not turn outward and increase stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure provided by this application;

[0014] Figure 2 It is a schematic diagram of the structure of the sealing strip provided by the present application;

[0015] Figure 3 It is a structural schematic diagram of the shielding tube group provided by the present application;

[0016] In the figure: 1. Shielding tube assembly; 2. Sealing seat; 3. Positioning column; 4. Sealing strip; 5. Fastening bolt;

[0017] 11. Shielding pipe sleeve; 12. Positioning groove; 13. Overhead line pipe cavity; 14. Inverted cavity; 15. Corrugated groove; 16. Tin foil layer; 17. Metal mesh; 18. Large triangular hole; 19. Small triangular hole. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0019] See also Figures 1 to 3 In this embodiment, a shielding device for an overhead line ground end is provided, comprising a shielding tube group 1, a sealing seat 2 is provided at both end ports of the shielding tube group 1, a plurality of positioning columns 3 are fixedly mounted on the sealing seat 2, the sealing seat 2 and the shielding tube group 1 are butt-jointed and sealed by the positioning columns 3, a sealing strip 4 is provided at the middle of the lower end surface of the shielding tube group 1, the sealing strip 4 is in a T-shape, and a plurality of fastening bolts 5 are provided on the sealing strip 4;

[0020] The shielding tube group 1 includes a shielding tube sleeve 11, a positioning groove 12, an overhead line tube cavity 13, an inverted cavity 14, a corrugated groove 15, a tin foil layer 16, a metal mesh 17, a large triangular hole 18 and a small triangular hole 19. A plurality of positioning grooves 12 are provided on the port of the shielding tube sleeve 11. The positioning grooves 12 are plugged into the corresponding positioning columns 3. An overhead line tube cavity 13 is provided in the middle of the shielding tube sleeve 11. An inverted cavity 14 is provided at the lower end of the overhead line tube cavity 13. The inverted cavity 14 is configured as an angle cavity. Two layers of ring-connected tin foil layers 16 are arranged inside the overhead line tube cavity 13, thereby forming a double-layer metal shielding layer, which reduces the incident energy of radiation interference, reduces the interference effect on the circuit, and enhances the anti-interference ability of the circuit. Compared with copper foil paper, tin foil paper has higher strength, a smoother surface and is not easy to oxidize, so it performs better in terms of corrosion resistance. A ring-connected metal mesh 17 is arranged in the gap cavity between the tin foil layers 16. The metal mesh 17 is composed of multiple fine gold The metal mesh 17 is woven from metal wire, which can effectively avoid the influence of other electronic equipment and electromagnetic interference in the surrounding environment on the stability of data transmission, and improve the speed and quality of data transmission. A number of triangular small holes 19 are arranged equidistantly in the middle of the end face of the metal mesh 17, and a number of triangular large holes 18 are opened on the left and right sides of the end face of the metal mesh 17. The metal mesh 17 is ring-connected so that one side of the triangular small hole 19 corresponds to the surrounding electronic equipment and residents, thereby increasing the bending ductility of the metal mesh 17 to ensure that the triangular small hole 19 can be consistent with the triangular large hole 18 after the ring connection, protecting the cable core inside from external force damage, and also playing a grounding protection role, so that the internal circuit is not affected by external electromagnetic interference, ensuring that the internal electromagnetic energy is not easily leaked. The lower end face of the shielding tube sleeve 11 is symmetrically provided with corrugated grooves 15, and the corrugations at the bottom of the corrugated grooves 15 are used to make high-area contact with the direct-buried ground to ensure that it will not turn outward during the direct burial process and increase stability.

[0021] The working principle of the utility model is:

[0022] When the utility model is used, the power cable can be quickly removed from the overhead line tube cavity 13 through the ring-connected double-layer tin foil layer 16 and the ring-connected metal mesh 17, the fastening bolt 5 is twisted to open the sealing strip 4, and the inverted cavity 14 is used to remove it, thereby eliminating the destructive disassembly and maintenance work on the power shielding layer; the corrugations at the bottom of the corrugated groove 15 are used to make high-area contact with the direct-buried ground to ensure that it will not turn outward during the direct burial process, thereby increasing stability; at the same time, the triangular large hole 18 and the triangular small hole 19 on the metal mesh 17 are used to face the inside of the hole, with the triangular small hole 19 facing the surrounding electronic equipment and residents, thereby greatly reducing electromagnetic interference, and can be flexibly adjusted in actual use, and reduce manufacturing costs during the production process.

[0023] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A shielding device for an overhead line ground terminal, comprising a shielding tube group (1), characterized in that: The shielding tube group (1) comprises a shielding tube sleeve (11), a positioning groove (12), an overhead line tube cavity (13), an inverted cavity (14), a corrugated groove (15), a tin foil layer (16), a metal mesh (17), a triangular large hole (18) and a triangular small hole (19); an overhead line tube cavity (13) is opened in the middle of the shielding tube sleeve (11); two layers of ring-connected tin foil layers (16) are arranged inside the overhead line tube cavity (13) to form a double-layer metal shielding layer; a ring-connected metal mesh (17) is arranged in the gap cavity between the tin foil layers (16); the metal mesh (17) is woven from a plurality of fine metal wires.

2. The overhead line ground end shielding device according to claim 1, characterized in that: The two end ports of the shielding tube group (1) are provided with sealing seats (2), a plurality of positioning posts (3) are fixedly mounted on the sealing seats (2), a plurality of positioning grooves (12) are provided on the ports of the shielding tube sleeve (11), the positioning grooves (12) and the positioning posts (3) are correspondingly arranged for insertion, and the positioning posts (3) connect and seal the sealing seat (2) and the shielding tube group (1).

3. The overhead line ground end shielding device according to claim 1, characterized in that: A sealing strip (4) is provided in the middle of the lower end surface of the shielding tube group (1); the sealing strip (4) is in a T-shape, and a plurality of fastening bolts (5) are provided on the sealing strip (4).

4. The overhead line ground end shielding device according to claim 1, characterized in that: The lower end of the overhead line tube cavity (13) is connected to a reverse cavity (14), and the reverse cavity (14) is configured as an angled cavity.

5. The overhead line ground end shielding device according to claim 2, characterized in that: The lower end surface of the shielding pipe sleeve (11) is provided with corrugated grooves (15) symmetrically on both sides, and the corrugations at the bottom of the corrugated grooves (15) are in high-area contact with the directly buried ground.

6. The overhead line ground end shielding device according to claim 1, characterized in that: A plurality of triangular small holes (19) are arranged at equal intervals in the middle of the end surface of the metal mesh (17), and a plurality of triangular large holes (18) are arranged on the left and right sides of the end surface of the metal mesh (17).

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